Participation in Arizona's delegate selection process is open to all voters who wish to participate as Democrats. Only registered Democrats are allowed to participate in the primary.

Tuesday 22 March 2016 (presumably): Arizona Primary. Hours 6:00a-7:00p MST (1300-0200 UTC). Delegate Pledging: Proportional Primary. Voter Eligibility: Closed Primary.

Primary
Source: Arizona Secretary of State.
Status: Official. Retrieved: Wednesday 6 April 2016.
Included in Nationwide vote.

Tuesday 22 March 2016 (presumably): 75 of 85 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Arizona Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be allocated National Convention delegates at either the congressional district or statewide level. How the Democratic Proportional Delegate Allocation Math works.

• 50 district delegates are to be pledged proportionally to presidential contenders based on the primary results in each of Arizona's 9 Congressional Districts.
• 25 delegates are to be allocated to presidential contenders based on the primary vote statewide.
  • 16 at-large National Convention delegates
  • 9 Pledged PLEOs

Primary
Source: Delegate Calculations from the Arizona Democratic Party.
Status: Official. Retrieved: Wednesday 6 April 2016.

Saturday 16 April 2016 (presumably): District Caucuses meet. National Convention District delegates are elected according to the results of the primary.

Saturday 14 May 2016 (presumably): State Convention and State Committee Meeting

National Convention Pledged PLEO and At-Large delegates are elected according to the results of the primary.

The remaining 10 National Convention delegates consist of

• 10 Unpledged PLEO delegates:
• 6 Democratic National Committee members.
• 4 Members of Congress (0 Senators and 4 Representatives).
• 0 Governors.
• 0 Distinguished Party Leaders.

These 10 delegates and will go to the Democratic National Convention officially "Unpledged".

4 January 2013: State Representative Phil Lovas (Republican-Peoria) introduces HB 2017 which would set the date for the 2016 Arizona Presidential Preference Primary to the same day as the Iowa Caucuses,

On 16 April 2014, Governor Janice K. "Jan" Brewer (Republican) signed HB2107. The bill changes the Presidential primary from the 4th Tuesday in February to the Tuesday immediately following 15 March.

6 January 2015: Phil Lovas (Republican) prefiles HB 2015 which would Arizona’s presidential primary to the "same date on which the Presidential Caucuses are held in Iowa."
3 April 2015: HB 2015 died when the state legislature adjourned sine die.